Texas Instruments TMP468EVM, User Manual

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USB-to-I
2
C
Converter
(MSP430)
TMP468
Remote 1 Remote 2 Remote 3 Remote 4 Remote 5 Remote 6 Remote 7 Remote 8
USB I
2
C
Dashed lines represent breakable connections on PCB.
Theory of Operation for the EVM Hardware
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4 SBOU184B – November 2016 – Revised August 2019
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TMP468EVM and TMP468QFNEVM
2 Theory of Operation for the EVM Hardware
The EVM consists of three sections that can be separated by breaking the PCB at the perforations. The dashed lines in Figure 5 represent
sections of the PCB that can be separated. The left-most section contains a standard USB Type A connector and a MSP430 microcontroller acting
as a USB-to-I
2
C converter. The middle section features the TMP468 device as well as the recommended passive components. The right-most
section provides eight discrete transistors that can be used as remote junctions for sensing temperature.
If the left and middle sections of the PCB are separated, they can be reconnected remotely using the 0.1-inch spaced pin holes provided. All of the
pin holes serve as test points, and are labeled on the back of the PCB. The middle section featuring TMP468 may be connected to another I
2
C
host for evaluation. In the remote junction section of the PCB, each individual transistor may be separated and re-wired for remote testing.
Figure 5. EVM Hardware Overview